Wall-form.



C. D. McARTHUR.

WALL FORM.

APPLICATION FILED ME 9. 1916- Patented Feb. 20,1917.

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WALL FORM. APPLICATION FILED JUNE 9. I916- Patented Feb. 20,1917.

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CHARLES D. MoARTI-TUR, 0F PITTSBURGH, PENNSYLVANIA, ASSIGNOIR '10 BLAW STEEL CONSTRUCTION CO11IPAN'Z', A CORPORATION OF NEW JERSEY.

WALL-FORM.

Specification of Letters Patent.

Application filed June s, 1916. Serial No. 102,606.

To all whom it may concern:

Be it known that I, CHAnLns D. Mo- ARTHUR, a citizen of the United States, residing at Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in WallForms, of which the following is a specification.

The invention relates to forms for use in the construction of concrete walls It has for its primary objects the provision of an improved type of form wherein the upright frame members or girder-sin contact with the concrete, and the transverse frames or wales can be left in position after the removal of the lagging plates; the provision of improved means for detachably locking the upright and transverse frame members together; the provision of improved means for positioning the transverse frame members with respect to the upright frame members and for maintaining them against relative lateral movement; the provision of improved means for supporting the lagging plates from the transverse frame members; and the provision of a form of simple construction, easily assembled and disassembled and of great stiffness and rigidity. One embodiment of the invention is illustrated in the accompanying drawings, wherein- Figure 1 is a front elevation of the wall form in position for use; Fig. 2 is a longitudinal section on the line TI-II of Fig. 1.; Fig. 3 is a plan view of the form; Fig. 4 is a section on the line TV -TV ofFig. 5; Fig. 5 is an enlarged detail section on the line V-V of Fig. 1; and Fig. 6 is a bottom View of the ends of two of the transverse frame members.

The wall consists of a plurality of main frame members or girders 1, 1, 1, preferably placed upright, a plurality of transverse frame members 2, 2, extending continuously across the entire form, a plurality of other transverse frame members 3, 3, 3, 3, of only half the length of the members 2, 2, and which may be termed to distinguish them transverse supporting members, and a plurality of lagging plates 4, 4, 4, 4, each supported at its transverse edges by a transverse frame member 2 and a transverse supporting member 3.

The construction of the main frame members 1, 1, 1, will be seen by reference to Figs. 3 and 5. Each of these members consists of a pair of opposing Z bars 5 and 6 with a connecting plate 7 adapted to contact with the concrete. The 2 bars 5 and 6 are further supported from each other by means of spacing sleeves 7 and bolts 8 spaced at intervals along the length of the girders.

Each of the lagging plates 4 is provided at its horizontal and vertical edges with angle irons 9 and 10, the angles 9 being at the vertical edges (Figs. 3 and 5) and the angles 10 at the horizontal edges (Fig. 2). As indicated in. Fig. 5 the angle 9 overlaps the edge of the plate 7 forming the base plate of the upright frame member. The upright flanges of the horizontal angles 10 on adjacent plates oppose each other, as indi cated in Fig. Other angles 11 are riveted or otherwise secured to the faces of the lagging plates intermediate their upper and lower edges. These angles serve to stiffen the plates.

The transverse supporting members 3, 3, are of U-shape in cross section, as indicated in Fig. 4. These supporting members may lie over one of the stiffening angles 11 on the lagging plates, as indicated in Fig. 4, and at the bottom of Fig. 2, or they may lie over the angles 10 secured to the edges of abutting lagging plates, as indicated at the middle supporting member of Fig. 2. These members 3 are provided at intervals with downwardly projecting straps 12 recurved, as indicated at 13 (Fig. 4) to engage the tops of the angles 11 or the tops of the angles lO. In this way the necessary support is given to the lagging plate beneath.

The method of securing the ends of the members 3 to the upright frame members will be seen by reference to Figs. 4 and 5. The Z bars 5 and 6 are provided with slots adjacent their outer edges and into these slots project the ends of the hooked rods 14. The outer ends of the rods 14 are slotted and carry the wedges 15. When the wedges are driven into place the members 3 are tightly clamped to the outer flanges of the Z bars 5 and 6. Extending transversely across the ends of the U shaped members 3 are the plates 16 having the slots 17 for the passage of the bolts 14 (Fig. 6) and secured in position by means of the rivets 18 and 19. The rivets 19 also perform an additional function, which is to prevent the members 3 from moving laterally with respect to the Z bars 5 and 6. In

forations which receive the projecting ends of the rivets 19 (Fig. 5), thus providinga positive means for preventing the relative lateral movement of the supporting members 3 with respect to the upright frame members.

The transverse frame members 2, 2, are the same in construction as the supporting -members 3 above described and illustrated in Figs. 4 and 5. The members 2, 2 are secured to the girders 1, 1, 1, by means of the same form of hooked rods and wedges as illustrated in Figs. 4 and 5, the principal distinction between the members 2 and 3 being that the members 2 extend across and between more than two of the upright girders, while the members '3 are shorter and extend onlyfrom one girder to the next one.

In setting up the apparatus for use the upright girders 1, 1, 1, are first positioned, after which the lower lagging plates are placed in position and the transverse supporting members 3, 3, secured at their ends to the upright girders by means of the hooked rods and wedges. The next lagging plates are then positioned and the transverse frame member 2 similarly secured in position, such operation being continued until the entire form is assembled.

The concrete is applied against the face of the laggingplates and against the face of the uprights 1,1, 1, in the usual way, and after its initial set the construction permits of the removal of the lagging plates for re- "use, while the uprights 1, 1, 1, and trans verse members 2, 2, are left in position until the concrete attains its full strength. By this I arrangement the concrete is sufiiciently supported by the frame work during the major portion of the setting operation while the lagging plates are released for other relations within a short time. The transverse frame members 2, 2, serve to secure the vertical girders 1, 1, 1, together andhold them properly positioned as a unitary frame after the removal of the lagging and. after the removal. of the transverse supports 8, 3. The transverse frame members 2, 2, can be extended over as many vertical girders as may-be desired and serve to stiffen and aline the girders andthe entire form.

It. will be seen that the removal of the .supporting members 3, 3, permits of the release of the lagging plates without the removal of the transverseframe members 2, 2. For instance, the removal of the central supporting members 3., 3, of Fig. 1-, releases the -';opposingedges of the two sets of lagging plates. These edges can then be pulled outwardly, the other edges of the lagging plates pivoting around the engagement be tween the angles 10 and the straps 12 on the art, the lagging plates being securely supported in position during the use of the form, and being very easily released after the setting of the concrete and without the necessity of removing either the vertical girders or the transverse frame members 2, 2.

What I claim is:

1. In combination in a wall form, a plurality of main frame members adapted to engage the concrete of the wall formed, transverse frame members extending between the said main frame members and detachablysecured thereto, transverse supporting members interposed between the transverse frame members and detachably secured to the main frame members, and lagging plates lyingbetween the main frame members with their transverse edges lying beneath and releasably held by the said transverse frame members and transverse supporting members respectively, and arranged so that when the transverse supporting members are removed, the lagging plates are each released at one edge and may be pulled from beneath the transverse frame members above their other edges.

2. In combination in a wall form, a plurality of spaced upright girders adapted to engage the concrete of the wall formed, transverse frames extending between the said girders and detachably secured thereto, transverse bars lying between the said frames and detachably secured to the girders, and lagging plates lying between the girders and having their horizontal edges lying beneath and releasably held by said transverse frames and transverse bars respectively, and arranged so that when the transverse bars are removed, the lagging plates are each released at one edge and may be pulled from beneath the transverse frames.

3. In combination in a wall form, a plurality of main frame members adapted to engage the concrete of the wall formed, transverse frame members extending between more than two of the said main frame members and detachably secured thereto, transverse supporting members located between the transverse frame members, and extending only from one main frame membertothe next one and detachably secured at their ends to said main frame member, and lagging plates lying between the main frame members with their transverse edges lying beneath, and releasably held by the said transverse frame members and transverse supporting members respectively, and arranged so that when the transverse supporting members are removed, the lagging plates are each released atone edge and may be pulled from beneath the transverse frame members above their other edges.

4. In combination in a wall form, a plurality of spaced upright girders adapted to engage the concrete of the wall formed, transverse members extending between the girders and secured releasably to the outer faces thereof, and lagging plates lying between the girders and having their horizontal edges lying beneath and releasably held by said transverse members and arranged so that when a transverse member is removed the edges of the lagging plates held thereby may be moved outward and laterally releasing the other edges of the lagging plates from the other transverse members.

5. In combination in a wall form, a pair of spaced upright girders adapted to contact with the concrete of the wall to be formed, transverse beams clamped releasably against the outer faces of the girders, lagging plates extending from girder to girder and from beam to beam and provided with outwardly projecting flanges at their upper and lower edges, and means projecting inwardly from the beams and engaging said flanges.

6. In combination in a wall form, a pair of spaced upright girders adapted to contact with the concrete of the wall to be formed, transverse beams clamped releasably against the outer faces of the girders, lagging plates extending from girder to girder and from beam to beam and provided with outwardly projecting flanges at their upper and lower edges, and means projecting inwardly from the beams and engaging said flanges, said means being recurved where they engage said flanges so as to prevent the flanges from moving vertically.

7. In combination in a wall form, a pair of spaced upright girders adapted to contact with the concrete of the wall to be formed, transverse beams resting against the outer Copies of this patent may be obtained for five cents each, by addressing the Washington, D. G.

faces of the girders, clamping rods hooked at their inner ends and engaging the girders and having their outer ends extending through the beams and threaded and provided with nuts, and lagging plates lying between the girders and releasably held by the beams.

8. In combination in a wall form, a pair of spaced upright girders adapted to contact with the concrete of the wall to be formed, transverse beams clamped releasably against the outer faces of the girders, lagging plates extending from girder to girder and from beam to beam and provided with outwardly projecting flanges, and spaced means projecting inwardly from the beams and engaging the edges of said flanges.

9. In combination in a wall form, a pair of spaced upright girders adapted to contact with the concrete of the wall to be formed, transverse beams bearing against the outer faces of the girders, lagging plates between the girders and held by the beams, means for clamping the beams against the outer faces of the beams, and interlocking means be- .tween the opposing faces of the girders and beams preventing their relative lateral movement but permitting a movement of the beams away from the girders after the clamping means are released.

10. In combination in a wall form, a pair of spaced upright girders adapted to contact with the concrete of the wall to be formed, transverse beams bearing against the outer faces of the girders, which facesare provided with perforations, lagging plates between the girders and held by themeans, means for clamping the beams against the outer faces of the girders, and rivets in the beams having projecting heads adapted to engage the said perforations and prevent relative lateral movement of the girders and beams.

CHAS. D. MOARTHUR.

Commissioner of Patents, 

